25242105 has 48 divisors (see below), whose sum is σ = 47836224. Its totient is φ = 11329920.

The previous prime is 25242097. The next prime is 25242131. The reversal of 25242105 is 50124252.

25242105 = 393² + 394² + ... + 514².

It is a happy number.

It is not a de Polignac number, because 25242105 - 2³ = 25242097 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 44554 + ... + 45116.

It is an arithmetic number, because the mean of its divisors is an integer number (996588).

Almost surely, 2^25242105 is an apocalyptic number.

It is an amenable number.

25242105 is a deficient number, since it is larger than the sum of its proper divisors (22594119).

25242105 is a wasteful number, since it uses less digits than its factorization.

25242105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646 (or 639 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 25242105 is about 5024.1521672816. The cubic root of 25242105 is about 293.3426355808.

Adding to 25242105 its reverse (50124252), we get a palindrome (75366357).

The spelling of 25242105 in words is "twenty-five million, two hundred forty-two thousand, one hundred five".